A sound insulation cover based on secondary noise reduction of a motor

Abstract

The utility model discloses an acoustic enclosure based on motor secondary noise reduction, including the acoustic enclosure main part of motor external wrapping, the acoustic enclosure main part includes inside sound absorption layer, intermediate sound insulation layer, external sound absorption layer and external wrapping layer, the acoustic enclosure main part whole is hollow cylindrical shape structure, and the inside is used for wrapping the upper and lower two half circle arc surface of motor and motor tail circular surface, the external wrapping layer is waterproof nylon cloth or other tough canvas. The device is widely applicable, reduces motor secondary noise reduction cost, and the customized manufacturing is simple and quick, and the operation installation is convenient.

Description

Technical Field

[0001] This utility model relates to a soundproof cover based on secondary noise reduction modification of an electric motor, belonging to the field of new energy vehicle technology. Background Technology

[0002] Electric motors can be simply divided into three structures from the inside out: stator and rotor, housing cavity, and housing. The housing cavity not only ensures the strength of the motor but also reduces its overall weight. On the other hand, it is used to arrange cooling water channels to prevent heat buildup during the operation of the stator and rotor.

[0003] The common motor noise reduction solutions on the market start with the structure of the motor itself. In a published patent "CN211089308U", noise-reducing damping material is stuffed into the cavity inside the motor housing. By increasing the damping coefficient of the motor housing, the vibration caused by the stator and rotor during operation is reduced, thereby achieving a certain noise reduction effect.

[0004] However, the drawbacks of this approach are also very obvious: the small gap space will inevitably increase the cost of the selected noise reduction materials; the thin space structure cannot effectively reduce the resonance effect on the housing when the stator and rotor are working; there is no secondary noise reduction solution after the product is finalized, and customers who modify vehicles or have high noise reduction requirements may need to customize open motors, which will significantly increase costs. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a soundproof cover based on secondary noise reduction modification of a motor, thereby solving the aforementioned technical problems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a soundproof cover based on secondary noise reduction modification of a motor, comprising a soundproof cover body wrapped around the motor; the soundproof cover body includes an inner sound-absorbing layer, a middle sound-insulating layer, an outer sound-absorbing layer, and an outer wrapping layer; the soundproof cover body is generally a hollow cylindrical structure, the interior of which is used to wrap the upper and lower semi-circular arc surfaces of the motor and the circular surface of the motor tail; the outer wrapping layer is waterproof nylon cloth or other tough canvas material.

[0007] Furthermore, the inner and outer sound-absorbing layers are made of flocculent porous sound-absorbing material.

[0008] Furthermore, the intermediate sound insulation layer is made of rigid nylon sound insulation material.

[0009] Furthermore, the internal sound-absorbing layer, the middle sound-insulating layer, and the external sound-absorbing layer are not strictly a three-layer structure. The number of sound-insulating and sound-absorbing layers can be adjusted according to the actual situation, but they must follow a cross arrangement of "insulation-absorption-insulation-absorption".

[0010] Furthermore, the soundproof cover body, formed by three parts (two semi-circular arc surfaces and the circular surface at the tail of the motor), can be fixed by Velcro or snap fasteners set between the outer wrapping layers.

[0011] The beneficial effects of this utility model are: 1. Significant noise reduction effect: The hollow cylindrical soundproof cover surrounding the motor effectively reduces the noise generated during operation. Actual test results show that the noise level is reduced by an average of 10-12 dB. This significant noise reduction effect improves vehicle ride comfort, especially in pure electric vehicles, enhancing the driving experience.

[0012] 2. Wide Applicability: The design of this soundproof enclosure takes into account various motor sizes and hole interference situations, making it flexible and adaptable to different types of motors. This means it can not only be used in the development of new car models, but also provide customized solutions for modified vehicles or customers with special noise reduction needs, enhancing the product's market adaptability.

[0013] 3. Reduced secondary noise reduction costs: Compared to traditional noise reduction solutions, the design of this soundproof enclosure greatly simplifies the selection and application of noise reduction materials, reducing the cost of secondary noise reduction. Users do not need to add complex internal noise reduction materials to the motor, reducing the economic burden of material procurement and installation.

[0014] 4. Convenient Installation: The quick-release design makes the soundproof enclosure easier to install in various environments. Using Velcro or snap fasteners, users can easily and quickly disassemble and reinstall the enclosure, greatly improving usability and adapting to different usage scenarios.

[0015] 5. Enhanced Motor Protection: Soundproof covers not only reduce noise but also protect the motor from external environmental influences to some extent, extending its lifespan. The application of waterproof nylon fabric or durable canvas provides additional protection for the motor, ensuring stable operation in harsh environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a comparison diagram of the noise levels before and after the installation of the soundproof cover for this utility model.

[0017] In the diagram: 1. Main body of the soundproof cover, 11. Inner sound-absorbing layer, 12. Middle soundproof layer, 13. Outer sound-absorbing layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0020] like Figure 1 As shown, a soundproof cover based on secondary noise reduction modification of a motor includes a soundproof cover body 1 that wraps around the motor; the soundproof cover body 1 includes an inner sound-absorbing layer 11, a middle sound-insulating layer 12, an outer sound-absorbing layer 13, and an outer wrapping layer; the soundproof cover body 1 is generally a hollow cylindrical structure, the interior of which is used to wrap the upper and lower semi-circular arc surfaces of the motor and the circular surface of the motor tail; the outer wrapping layer is waterproof nylon cloth or other tough canvas material.

[0021] In this preferred embodiment, the inner sound-absorbing layer 11 and the outer sound-absorbing layer 13 are made of flocculent porous sound-absorbing material.

[0022] In this preferred embodiment, the middle sound insulation layer 12 is made of rigid nylon sound insulation material.

[0023] In this preferred embodiment, the internal sound-absorbing layer 11, the middle sound-insulating layer 12, and the external sound-absorbing layer 13 form an integrated "insulation-absorption-insulation" cross structure.

[0024] In this preferred embodiment, the components of the soundproof cover can be fixed by Velcro or snap fasteners placed between the wrapping layers.

[0025] This device uses a cross-layering of sound insulation and sound absorption materials—"insulation-absorption-insulation-absorption"—to form the main body of the soundproof cover. The principle is as follows: a sound insulation layer, composed of an integrated layer of rigid nylon sound insulation material and porous, fibrous sound absorption material, is directly wrapped around the outside of the motor. The high-frequency electromagnetic noise generated by the motor's stator and rotor during operation, and the low-frequency vibration noise generated by the resonance of the motor's metal casing, are reduced through the three-layer treatment of the soundproof cover, thus reducing noise levels in decibels. The soundproof cover is composed of three detachable parts, allowing for convenient installation in various environments due to its quick-release and quick-installation characteristics. During manufacturing, based on the actual size of the motor and the interference of hole positions, the composite sound insulation material is wrapped, cut, and sewn using waterproof nylon cloth or other durable canvas to form three parts: the upper and lower semi-circular surfaces of the motor and the circular surface at the motor's tail. These parts are then sewn together with Velcro or snap fasteners for quick-release and quick-installation, ultimately assembling a hollow cylindrical soundproof cover that encloses the motor.

[0026] Due to the quick-release and quick-installation characteristics of the soundproof cover in this solution, it can provide a motor secondary noise reduction solution with short customization time, low cost, and quick installation, whether in the vehicle research and development stage or in the process of vehicle operation modification.

[0027] Based on real-world case studies and actual road tests conducted on a pure electric vehicle, the noise reduction effect is as follows: Figure 2 As shown, the average reduction is 10-12 dB.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A soundproof cover based on secondary noise reduction modification of a motor, characterized in that, The soundproof cover body (1) includes an outer cover for the motor; the soundproof cover body (1) includes an inner sound-absorbing layer (11), a middle sound-insulating layer (12), an outer sound-absorbing layer (13) and an outer covering layer; the soundproof cover body (1) is a hollow cylindrical structure, and its interior is used to cover the upper and lower semi-circular arc surfaces of the motor and the circular surface of the motor tail; the outer covering layer is waterproof nylon cloth or other tough canvas material.

2. The soundproof cover based on secondary noise reduction modification of a motor as described in claim 1, characterized in that, The inner sound-absorbing layer (11) and the outer sound-absorbing layer (13) are made of flocculent porous sound-absorbing material.

3. The soundproof cover based on secondary noise reduction modification of a motor according to claim 1, characterized in that, The intermediate sound insulation layer (12) is made of hard nylon sound insulation material.

4. A soundproof cover based on secondary noise reduction modification of a motor as described in claim 1, characterized in that, The internal sound-absorbing layer (11), the middle sound-insulating layer (12), and the external sound-absorbing layer (13) are a three-section soundproof cover component, and the number of sound-insulating and sound-absorbing layers can be adjusted in real time according to the needs of the modification project.

5. A soundproof cover based on secondary noise reduction modification of a motor as described in claim 4, characterized in that, The three-section soundproof cover components can be fixed by Velcro or snap fasteners placed between the outer wrapping layers.

Images